I wouldn't say they're terrible. For example, tomorrow's game is Yankees -1.5 (-115), so say you bet $1000, you'd gain $909 if the Yankees win by at least 2.
The point being, that seems like free money the way the Twins play against them. Of course, knowing how betting works, right when I'd put money in the Twins would inexplicably start winning against them. Which is why I won't do it. Sorry, Twins!